Open Flash Builder, create a new project. Make sure that you select the '4.0.0-air2.5' SDK. Create an app. Select Export Release Build. A swf should be created alongside the app.xml, possibly in the bin-debug directory.

That's it, the application should now be on your android. Click on the grid-like icon to get to the list of all applications on your system. Your app should show up there (alphabetical order)

That's all when it comes to putting together information that is publicly available. For specifics, best is to read the documentation provided within the pre-release program (which cannot be redistributed).